Texas Instruments Extensa 60x Series Maintenance Manual page 66

4.3.2.6 NS87336VJG Super I/O Controller
The PC87336VJG is a single chip solution for most commonly used I/O peripherals in ISA, and EISA
based computers. It incorporates a Floppy Disk Controller(FDC), two full featured UARTs, and an IEEE
1284 compatible parallel port Standard PC-AT address decoding for all the peripherals and a set of
configuration registers are also implemented in this highly integrated member of the Super l/O family.
Advanced power management features, mixed voltage operation and integrated Serial-lnfrared(both IrDA
and Sharp) support makes the PC87336 an ideal choice for low-power and/or portable personal computer
applications.
The PC87336 FDC uses a high performance digital data separator eliminating the need for any external
filter components. It is fully compatible with the PC8477 and incorporates a superset of DP8473, NEC
PD765 and N82077 floppy disk controller functions. All popular 5.25' and 3.5' floppy drives, including
the 2.88 MB 3.5' floppy drive, are supported. In addition, automatic media sense and 2 Mbps tape drive
support are provided by the FDC.
The two UARTs are fully NS16450 and NS16550 compatible. Both ports support MIDI baud rates and
one port also supports IrDAs the HP SIR and Sharp SIR compliant signaling protocol.
The parallel port is fully IEEE 1284 level 2 compatible. The SPP(Standard Parallel Port) is fully
compatible wit ISA and EISA parallel ports. In addition to the SPP, EPP(Enhanced Parallel Port) and
ECP(Extended Capabilities Port) modes are supported by the parallel port.
A set of configuration registers are provided to control the Plug and Play and other various functions of
the PC87336. These registers are accessed using two 8-bit wide index and data registers. The ISA I/O
address of the register pair can be relocated using a power-up strapping option and the software
configuration after power-up.
When idle, advanced power management features allows the PC87336 to enter extremely low power
modes under software control. The PC87336 car operate from a 5V or a 3.3V power supply. An unique
I/O cell structure allows the PC87336 to interface directly with 5V external components while operating
from a 3.3V power supply.
Some of the major features include:
100% compatible with ISA, and EISA architectures
The Floppy Disk Controller:
Software compatible with the DP8473, the 765A and the N82077
16-byte FlFO(disabled by default)
Burst and Non-Burst modes
Perpendicular Recording drive support
New high-performance internal digital data separator(no external filter components required)
Low-power CMOS with enhanced power-down mode
Automatic media-sense support, with full IBM TDR(Tape Drive Register) implementation
Supports fast 2 Mbps and standard 1 Mbps/500 kbps/250 kbps tape drives
4-20 Theory of Operation